Simulation of Rock Mechanical Behavior Under Cyclic Loading Using Clump Parallel-Bond Models
Simulation of Rock Mechanical Behavior Under Cyclic Loading Using Clump Parallel-Bond Models
复制标题
使用块体平行键模型模拟循环加载下的岩石力学行为
DOI：
10.1007/s10706-018-00757-1
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发表时间：
2018-11
影响因子：
1.7
通讯作者：
Xia Ming
中科院分区：
文献类型：
--
作者：
Xia Ming
为了研究岩石在循环加卸载条件下的力学行为，采用块体平行键模型（CPBM）结合新提出的加载方法进行了数值模拟，并将模拟结果与实验结果进行了比较。然后对不同围压下的完整岩石和不同裂纹倾角的预裂岩石进行了详细的研究。相关的数值结果表明：（1）CPBM与新提出的加载方法相结合，可用于模拟完整岩石和预裂岩石在循环加卸载条件下的力学行为。模拟结果与实验结果吻合较好;（2）加载过程中微观裂纹数量随循环次数的增加而增加，而卸载过程中微观裂纹生成较少。围压越高，岩石在循环加载过程中累积的损伤越小;（3）预存缺陷的倾角对宏观断裂模式有显著影响。
In order to investigate rock mechanical behavior under cyclic loading and unloading conditions, the clump parallel-bond model (CPBM) combined with the newly-proposed loading procedure was used in numerical simulations and the simulated results were compared with those of the experiment. Then the intact rock under different confining pressures and pre-cracked rock with different flaw inclination angles are also investigated in detail. The related numerical results have demonstrated that: (1) the CPBM, combined with the use of the newly-proposed loading procedure, can be used to modelling the intact rock and pre-cracked rock mechanical behavior under cycle loading and unloading conditions. The simulated results are in good agreement with the experimental results; (2) the number of microscopic cracks increases with the cycle increases during the loading process, while few microscopic cracks are generated during the unloading process. The higher the confining pressure, the less damage the rock has accumulated during the cyclic loading process; (3) the inclination of the pre-existing flaw has a significant effect on the macroscopic fracture pattern.
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